參數(shù)資料
型號: RXC101
廠商: RF Monolithics, Inc.
英文描述: Multi-channel High data rate Programmable
中文描述: 多通道可編程數(shù)據(jù)率高
文件頁數(shù): 17/33頁
文件大?。?/td> 546K
代理商: RXC101
17
Configuration Register
[POR=893Ah]
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
1
0
0
BAND1
BAND0
LBDEN
WKUPEN
OSCEN
CAP3
CAP2
CAP1
CAP0
BB2
BB1
BB0
CLKEN
The configuration register sets up the following:
Internal Data Register
Internal FIFO
Frequency Band in use
Crystal Load capacitance
Bit [15..13] –
Command Code:
These bits are the command code that is sent serially to the processor
that identifies the bits to be written to the configuration register.
Bit [12..11] –
Band Select:
These bits set the frequency band to be used. There are four (4) bands that
are supported. See Table 4 for Band configuration.
TABLE 4.
Bit [10] –
Low Battery Detector:
This bit enables the battery voltage detect circuit when set. The battery
detector can be programmed to 32 different threshold levels. See
Battery Detect Threshold and
Clock Output Register
section for programming.
Bit [9] –
Wake-up Timer Enable:
This bit enables the wake-up timer when set. See
Wake-up Timer
Period Register
section for programming the wake-up timer interval value.
Bit [8] –
Crystal Oscillator:
This bit enables the oscillator circuit when set. The oscillator provides the
reference signal for the synthesizer when setting the transmit or receive frequency of use.
Bit [7..4] –
Load Capacitance Select:
These bits set the load capacitance for the crystal reference. The
internal load capacitance can be varied from 8.5pF to 16pF in .5pF steps to accommodate a wide
range of crystal vendors as well as adjust the reference frequency and compensate for stray
capacitance that may be introduced due to PCB layout. See Table 5 for load capacitance
configuration.
TABLE 5.
Frequency Band
315
433
868
916
BAND1
0
0
1
1
BAND0
0
1
0
1
CAP3 CAP2
CAP1
CAP0
Crystal Load
Capacitance
8.5
9
9.5
10
……
15.5
16
0
0
0
0
1
1
0
0
0
0
0
0
1
1
1
1
0
1
0
1
0
1
……
1
1
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